新栽的核桃幼树,往往由于管理不善,枝条组织发育不充实,尤其经过冬季严寒,早春温度骤变以及春风的侵袭,使枝条内部水分大量消耗,造成枝干从上而下逐渐干枯,严重时一直干到地表面。老乡把这种现象称为“抽条”。抽条在我国北方较普遍发生,轻者引起树形紊乱,逐渐形成小老树,影响生长和结果,严盈的造成死亡。为防止抽条,必须加强综合管理,提高幼树的抗寒力。具体技术措施如下: Newly planted walnut saplings, often due to poor management, branch development is not fully developed, especially after the winter cold, sudden change in temperature in early spring and the spring breeze invasion, so that the branches of a large amount of water consumption, resulting in the branches from top to bottom gradually dry, serious Always dry to the surface. The villagers call this phenomenon a “draw bar.” Sampling is more common in the northern part of our country. Light causes disorder of tree shape and gradually forms small old tree, which affects growth and result. In order to prevent drawing, we must strengthen the integrated management and improve the cold hardiness of saplings. Specific technical measures are as follows: